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(No Model.) 3 Sheets-Shet 1. W. F. GARDNER. TIME CONTROLLING ANDCORRECTING SYSTEM.

No. 335,186. Patented Feb. '2, 1886.-

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3 SheetsSheet 2. W. F. GARDNER. TIME CONTROLLING AND GORREGTING SYSTEM.

Patented Feb. 2, 1886.

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W. F. GARDNER. TIME CONTROLLING AND CORRECTING SYSTEM.

Patented Feb. 2, 1886 UNITED STATES PATENT Grrrcn.

IVILLIAM F. GARDNER, OF XVASHINGTON, DISTRICT OF (JOIJUIIIBIA.

TIME CONTRGLLING AND CORRECTING SYSTEM.

SPECIFICATION forming part of Letters Patent No. 335,186, dated February2, 1886.

Application filed March 31, 1895.

To all whom it may concern.-

Be it known that 1, WILLIAM F. GARDNER, a citizen of the United States,residing at Washington, in the District of Columbia, have inventedcertain new and useful Improvements in Time Controlling and CorrectingSystems, of which the following is a specification, ref 3rence being hadto the accompanying drawings.

My invention relates to a system for automatically controlling clocks,and sending timesignals, and is an improvement on the system granted tome in Letters Patent Nos. 287,015 and 307 ,287

The invention consists, first, in an auxiliary clock-plate having a seatfor the magnets; second, in an adjustable magnet, armature lever, andsecondary controlling-springs; and, third, in means for automaticallygiving a sound or signal at the instant of the action of the controllingmechanism.

It further consists in certain details of construction, arrangement, andoperation of the several parts, as will be hereinafter more fully setforth in the specification, and pointed out in the accompanyingdrawings, in which- Figure 1 is a perspective view of my device Fig. 2,a front elevation of same Fig. 3, a front elevation, partly in section,ofsame; Fig. 4, a detail perspective view of the same and the shoulderedarbor of the minute-hand, and Fig. 5, a detail side elevation of theshouldered arbor, adjustable friction-spring, and bridge plate; Fig. 6,a perspective view of the device for producing the audible signal.

The action of the magnets, the armaturelever, and the correctingmechanism does not differ from that described in the patents abovereferred to.

In the present instance the actuating-bar I, with the rings 1, is struckup from a single piece of metal, the push-points P P being securedthereto. The point I has a slot, .2, in which the set-screws .2 enter,and by means of which the point is rendered adjustable on the bar. Theupper end, i, of the bar is given a half-twist, so as to bring thepointst' at right angles to the line of direction of the armaturelever.The push-bar is raised above the front plate, 7;, of the clock by meansof theguideblocks a a, the lower end of said bar passing throughthelower guide-block, whereby Verticality of the bar is insured andslipping pre- Serial No. 160,765.

(No model.)

vented. The dialtrain does not differ from that shown in my formerpatents, except that a double bridge-plate, J, is placed on the frontplate, It, of the clock.

In my Patent No. 307,287 the push-points were cutaway at the end ontheir inner face, so as to leave the outer and lower portions flat,andthe inner parts curved to fit the groove at the top of the cam, thepoints centering with the center of the cam, the fiat part extendingslightly beyond the outer face of the cam, so both the fiat part and thepoint should strike the ledge and the cusp of the cam simultaneously.

In the present instance the minute-hand arbor Q is cut away, as at n",Fig. 4, so as to.

leave a flat surface on said arbor, similar to the lip or fiat ledge onthe cam, as just described. This cut-away part may be in front or in therear of the cam. In Fig. 3 I have shown it in front of the cam and inFig. 4: in rear thereof. I prefer, however, to have it in the rear ofthe cam. In this construction the lip t of the push-point strikessquarely against the shoulder a at the same instant that the projectingpoint enters the cusp in the cam F. I thus prevent any forward orbackward movement of the cams and hands and arrive at an exactzero-point at the instant of the correcting-signal.

The sleeve Q, which slips over the minutehand arbor Q, passes throughthe front plate, k, and has a flange, n", which bears against thefriction-spring M. A double foot-bridge plate, J'-, attached to the rearof the front plate, k, supports the arbor Q, and gives room between thepoints of attachment for the friction-spring to move freely therein. Theplate M, Fig. 5, prevents the spring M from slipping and eX- ertsfriction on the arbor, as in Patent No. 807,287.

It is not deemed necessary to describe the action of the cam push-bar,as it does not differ from that described in my former patent.

In order to obtain adj ustability of the magnets B and thearmaturelever, so as to regu late or obtain a proper throw or strokeupon the cam-bar, it has been found more convenient to remove themagnets from the back plate,K, where they were located in my formerpatents. I have now provided a back supporting-plate, It, to which theentire clock-move ment is secured by the posts 1). At one side of saidback plate is an extension, is, which turns downwardly and thenhorizontally outward, as at 70, forming a supporting plate or tablelongitudinally slotted,as at k The plate N of the magnets B (but one ofwhich is here shown) is mounted on the table k. A setscrew, 0, entersplate N between the magnets, and permits said magnets to be moved alongthe slot 76', and be clamped or fastened in any required position.

In Fig. 2 not only the magnets, but the post Aand insulatedcontact-supportO,are adj usted back and forth in the slot. The object ofthis adjustment is to regulate the distance of the magnets from thearmature, and thus regulate the vertical movement or throw of the leverA. This enables me to obtain the exact and vertical action of said leverupon the cam-bar, and prevent unduestrain upon said bar. The insulatedsupport 0 and its contact-springs b 1) form the secondary transmitter.

It will be observed that the core of the magnets must be directly andcentrally beneath the center of the armature,so as to obtain the fulland direct action of the magnets when energized. By means of the slot isin the table I am enabled to turn the magnets around in the slotslightly, but sufficiently for this purpose.

Sometimes when the variation or correction is very small the movement ofthe hands backward to the zero-point is hardly perceptible, and in myformer p'atents there was nothing to verify the sight but the slightsound given out by the downstroke of the armature-lever and cam-bar. Itis desirable to have the ear act in unison with the eye for theverification of the setting or correcting signal. To this end I haveprovided an audible signal, preferably a bell,located outside of theclock-case,

which bell will be sounded at the instant of the final signal, and bythe simultaneous and automatic action of the armature-lever through theintervention of the magnets. The mechan ism therefor consists of alever, h, provided with a striking-balLh. This lever his secured to abar, 9, journaled in the front and back plates, k It. To this journaledbar a bent arm, G, is secured and engages with the armaturelever A bymeans of the loop 9'. The bell H is preferably located at the outsideand at the upper end of the clock-case, the lever h passing through anopening in the case. It is obvious that the hell or indicator may beplaced within the case; but in order that the sound orsignal be clearand distinct I preferably place the bell on the outside, as shown in thedrawings. The bell may be located at the bottom of the clock-ease, asshown in Fig. 3. In this case the lever h is secured to a pivoted bar,f, to which the lever f is also secured. The lower end of thecam-actuating bar strikes against said lever f and depresses it. Thisaction causes the bell to be soundedv by raising the lever h. I may ofcourse use some other form of signal or indicator than the bell withoutdeparting from the spirit of my invention.

The operation of the mechanism is as follows: When the correcting-signalis sent (as in my former patents) and the armature-lever A depressed, itnot only pushes down the cam-actuating bar, (which corrects the handserror, asbefore described in my former patents, but at the same timedepresses the bent bar G, and this, through the intervention of bar 9and lever h, sounds the bell or indicating-signal.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a time correcting and controlling system, a controlled clock in amain line or local circuit provided with a magnet, armaturelever, anderror-correcting mechanism for the hands, said lever acting, through theintervention of suitable mechanism, to give an audible signal at theinstant of the control, substantially as set forth.

2. In a time controlling and correcting system, a controlled clockprovided with mechanism for correcting the clock error, said clock beingprovided with an audible signal actir ated by the correcting mechanism,so as to be automatically sounded at the instant of control,substantially as set forth.

3. In a time controlling and correcting system, a clock one or more ofthe hands arbors of which are provided with a cam and are cut away'toform a flat strikingsurfaee for a lip or ledge on the cam push-point,substantially as set forth.

4. In a time controlling and correcting system, a controlled clock thehands arbors of which have a flat striking-surface, and a cam secured tosaid arbor in front or rear of said striking-surface, substantially asset forth.

5. In a controlled clock in a time controlling and correcting system,the combination, with the dial-frame and cam-actuating mechanism, of thehands arbors, one or more of which are provided with a flatstriking-surface, and a cam in front or rear of said flat surface,whereby the cam push-point simultaneously strikes the cam and arbor, andthereby prevents any backward or forward movement of the arbors andhands at the instant of correction, substantially as set forth.

6. A controlled clock in a time controlling and correcting system, oneor more of the hands arbors of which are provided with a sleeve, Q,having a flange, it, against which the friction-spring M comes incontact, substantially as set forth.

7. In a time controlling system in which the hand of the controlledclock is set by means of a cam on its arbor actuated by a push-bar, thecombination, with the front plate, of a bridge-plate in rear thereof, inwhich is placed the friction-spring which connects the cam to the arbor,substantially as and for the purpose set forth.

8. In a time controlling system, a clock provided with an auxiliarysupporting-plate for the clock-movement, said plate having an extensionprovided with a slotted table to sup- 11. In a time controlling andcorrecting system, the combination, with the clock-movement having ahands correcting mechanism, of an audible signal actuated by thevertical movement of the cam-bar, as set forth.

12. In a time controlling and correcting system, a clock provided withmeans for correcting its error, and an audible signal actuated throughthe intervention of suitable mechanism by the armature-lever of thecorrecting mechanism, as set forth.

In testimony whereof I affix my signature in presence of two witnesses.

IVM. F. GARDNER.

Vitnesses:

W. J. JOHNSTON, EMMA M. GILLETT.

